bjoernager/rust
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Always emit help when failing to parse enum variant

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This commit is contained in:
Esteban Küber 2023-11-07 00:09:33 +00:00
parent 1575e6e96e
commit 4e524386e9
3 changed files with 11 additions and 2 deletions
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9
compiler/rustc_parse/src/parser/item.rs
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@ -1450,6 +1450,8 @@ impl<'a> Parser<'a> {
self.recover_diff_marker();
let variant_attrs = self.parse_outer_attributes()?;
self.recover_diff_marker();
let help = "enum variants can be `Variant`, `Variant = <integer>`, \
`Variant(Type, ..., TypeN)` or `Variant { fields: Types }`";
self.collect_tokens_trailing_token(
variant_attrs,
ForceCollect::No,
@ -1486,6 +1488,7 @@ impl<'a> Parser<'a> {
this.eat_to_tokens(&[&token::CloseDelim(Delimiter::Brace)]);
this.bump(); // }
err.span_label(span, "while parsing this enum");
err.help(help);
err.emit();
(thin_vec![], true)
}
@ -1502,6 +1505,7 @@ impl<'a> Parser<'a> {
this.eat_to_tokens(&[&token::CloseDelim(Delimiter::Parenthesis)]);
this.bump(); // )
err.span_label(span, "while parsing this enum");
err.help(help);
err.emit();
thin_vec![]
}
@ -1527,8 +1531,9 @@ impl<'a> Parser<'a> {
Ok((Some(vr), TrailingToken::MaybeComma))
},
).map_err(|mut err| {
err.help("enum variants can be `Variant`, `Variant = <integer>`, `Variant(Type, ..., TypeN)` or `Variant { fields: Types }`");
)
.map_err(|mut err| {
err.help(help);
err
})
}